Ogryns are not completely unheard of in the hive. Typically housed by house Goliath, they are admired for their brute strength and ability to suffer tremendous amounts of pain, which would otherwise cripple a man. Their kind is uncommon in the hive but certainly is not unheard of.
Ogryns are mainly known for being hired guns but they also band together in small gangs. Most are untrusting of Ogryns and so are all too often seen more and brutes and bullies using their sheer size and mass to strike fear into the hearts of their victims.